Flock of maybe 8-10 waxwings in tree.
No interactions present.
Pretty distinctive, even at this angle, with the yellow tail tip showing up nicely. For the record you can rule out Cedar Waxwing (an extreme rarity from North America) by the dark rusty-red vent.
Lat/Lng: 51.5397393, 0.0232453
OS grid ref: TQ404842
Opposite West Ham Park where I may have seen them earlier in year but was unsure of ID